Skyrim - Best bow in the game?

The ones you can make yourself with maxed out smithing, alchemy and enchanting skills are far, far better than anything you'll find

A daedric bow, improved to legendary status while wearing 4 pieces of +29% fortify smithing armour and drinking a +130% fortify smithing potion, will do over 700 base damage. I't extremely rare to pick up a bow which does more than a tenth of that